Updating Formik initialValues via array push does not refresh initial values/form via csv file upload

I have the following Formik initial values setup:

const INITIAL_VALUES = {
  taskName: 'Test',
  taskNotes: 'Some notes',
  areaGroups: [
     {
       name: Area Group 1,
       areaInfo: [
          {
             areaName: "Area 1",
             areaCode: null
          }
       ]
    }
 ]
};

What I am then doing is providing the user the option of loading a CSV file in order to avoid the user from entering further areaInfo data via the frontend form.

The following code seems to add the loaded CSV values to the areaInfo array, which I can see from a console.log(values) but doesn't actually update/refresh the INITIAL_VALUES above or form.

The thing is though, when I click into the areaName form field within the areaInfo array, it then refreshes and displays my loaded CVS data but doesn't display it after I select the csv file to load/parse?

My component code for this is as follows and is using react-dropzone and papaparse npm packages:

const PerformUpload = ({ values }) => {

    const formikProps = useFormikContext()  
    const classes = useStyles();

    const onDrop = useCallback(acceptedFiles => {      
        acceptedFiles
            .filter((file) => file.type === "text/csv")
            .forEach(async (file) => {
                const text = await file.text();
                const result = parse(text, { header: true });
                const myData = result.data

                myData.map((data) => (
                  values.areaGroups[0].areaInfo.push(
                      {
                        "areaName": data.areaname,
                        "areaCode": data.areacode
                      }
                  )
                ))
            });            
      }, []);  
    const { getRootProps, getInputProps, isDragActive } = useDropzone({ onDrop });  

    return (
        <React.Fragment>
         <section className="container">
          <div {...getRootProps({className: 'dropZone'})}>      
            <input {...getInputProps()} />
            <p>Drag files here or click to select a file</p>
          </div>
        </section>
        </React.Fragment>
      )      
  }

I am performing the push to the values.areaGroups[0].areaInfo array but not sure if this correct as it doesn't refresh the frontend/initial values until I physically click on the field.

FYI, this PerformUpload component is being called from within:

<Formik
   enableReinitialize={true}       
   initialValues={INITIAL_VALUES}
   ....    

Not sure what I am missing/doing wrong?

I managed to solve my issue by using Formik's setFieldValue prior to pushing the data into my initial values.